73018380961 has 4 divisors (see below), whose sum is σ = 74799317124. Its totient is φ = 71237444800.

The previous prime is 73018380949. The next prime is 73018380973. The reversal of 73018380961 is 16908381037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16908381037 = 163 ⋅103732399.

It is an interprime number because it is at equal distance from previous prime (73018380949) and next prime (73018380973).

It can be written as a sum of positive squares in 2 ways, for example, as 37546425361 + 35471955600 = 193769^2 + 188340^2 .

It is a cyclic number.

It is not a de Polignac number, because 73018380961 - 2⁷ = 73018380833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73018380661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890468020 + ... + 890468101.

It is an arithmetic number, because the mean of its divisors is an integer number (18699829281).

Almost surely, 2^73018380961 is an apocalyptic number.

It is an amenable number.

73018380961 is a deficient number, since it is larger than the sum of its proper divisors (1780936163).

73018380961 is a wasteful number, since it uses less digits than its factorization.

73018380961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780936162.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 73018380961 in words is "seventy-three billion, eighteen million, three hundred eighty thousand, nine hundred sixty-one".